My Sketch

var coins;

var turtle;

var score = 0;

function setup() {

  createCanvas(windowWidth, windowHeight);

  turtle = createSprite(width / 2, 50);

  turtle.addImage(loadImage("turtle.png"));

  coins = new Group();

  for (var i = 0; i < 10; i++) {

    var c = createSprite(

      random(100, width-100),

      random(100, height-100),

      10, 10);

    c.shapeColor = color(255, 255, 0);

    coins.add(c);

  }

  player = createSprite(50, 50, 40, 40);

  player.shapeColor = color(255);

}

function draw() {

  background(50);

  player.velocity.x = 

    (mouseX-player.position.x)*0.1;

  player.velocity.y = 

    (mouseY-player.position.y)*0.1;

  player.overlap(coins, getCoin);

  drawSprites();

  fill(255);

  noStroke();

  textSize(72);

  textAlign(CENTER, CENTER);

  if (coins.length > 0) {

    text(score, width/2, height/2);

  }

  else {

    text("you win!", width/2, height/2);

  }

}

function getCoin(player, coin) {

  coin.remove();

  score += 1;

}

​